MPSC Rajyaseva 2025 GS Paper 1 — Question 56
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तापमान वाढीचा परिणाम वायूच्या मितप्रवाहीपणा/स्निग्धता (viscosity) वर कसा होतो ? What is the effect of increase in temperature on viscosity of gases ?
1)(1) मितप्रवाहीपणा/स्निग्धता (viscosity) वाढतो / Viscosity increases✓ Correct
2)(2) मितप्रवाहीपणा/स्निग्धता (viscosity) कमी होतो / Viscosity decreases
3)(3) मितप्रवाहीपणा/स्निग्धता (viscosity) स्थिर राहतो / Viscosity remains constant
4)(4) मितप्रवाहीपणा/स्निग्धता ऋण होतो / Viscosity becomes negative
Unlike liquids where viscosity decreases with temperature, the viscosity of gases increases with an increase in temperature because higher temperature increases molecular collision rates and momentum transfer.
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